Of course, it was difficult to track anything among the rocks and boulders.

They have been used to track ocean circulation, among other things.

If you piece enough of it together, you may be able to track him among the bayous.

At the same time, they tracked disease and mortality among 8,096 residents.

As he followed behind, he could track the vehicle by the play of its lights among the trees.

You might go out and track him across ten thousand light-years and among a million stars.

Researchers tracked information about medication use among 37,712 men aged 45 to 69 years between 2002 and 2003.

The settlement was the largest involving an English-only policy since the agency began tracking the practice among employers four years ago.

The study is one of the most comprehensive attempts to track tuberculosis infection among the homeless.

In the study, researchers tracked sleep patterns among 50 kids with type 1 diabetes aged 10 to 16.